Is simplesamlphp/saml2 affected by CVE-2025-27773?

Packagist simplesamlphp/saml2 is affected in =5.0.0-alpha.1 <5.0.0-alpha.20.

Is CVE-2025-27773 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2025-27773

Q: Is CVE-2025-27773 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

Packagist · simplesamlphp/saml2 • Packagist · simplesamlphp/saml2-legacy

Summary

The SimpleSAMLphp SAML2 library incorrectly verifies signatures for HTTP-Redirect binding

Severity: high
EPSS: 0.3% (p21)
Also known as: GHSA-46r4-f8gj-xg56#simplesamlphp/saml2, GHSA-46r4-f8gj-xg56#simplesamlphp/saml2-legacy
Published: 2025-03-11

References

https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56
https://nvd.nist.gov/vuln/detail/CVE-2025-27773
https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0

Related advisories

CVE-2024-52806 — medium · Packagist/simplesamlphp/saml2

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.